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When assistance becomes dependence

Narseo Vallina-Rodriguez, Jon Crowcroft, Alessandro Finamore, Yan Grunenberger, Konstantina Papagiannaki
2013 ACM SIGMOBILE Mobile Computing and Communications Review  
We present the characterization of the accuracy, location acquisition speed, energy cost, and network dependency of the state of the art A-GPS receivers shipped in popular mobile devices.  ...  The results reveals a number of inefficiencies as a result of the strong dependence on the cellular network to obtain assisting data, implementation, and integration problems.  ...  Acknowledgements: A. Finamore has been sponsored by the EU-IP mPlane project under the European Comission grand N-318627.  ... 
doi:10.1145/2557968.2557970 fatcat:v5v5y5ubcjfrxazwvxefwmsaiq

Location-dependent query processing

Sergio Ilarri, Eduardo Mena, Arantza Illarramendi
2010 ACM Computing Surveys  
Specifically, location-based services and location-dependent queries have attracted a lot of interest.  ...  In this article, the existing literature in the field of location-dependent query processing is reviewed.  ...  Similarly, Spacerace [Drab and Binder 2005] is a treasure hunt game for Assisted GPS phones.  ... 
doi:10.1145/1670679.1670682 fatcat:6mlurrqvgvaapmw5pmm7sfz6n4

Software For Dependable Systems

Daniel Jackson, Martyn Thomas, Lynette I. Millett, Trace Baker
2008 Insight  
as a balancing of costs and benefits and a prioritization of risks-is vital.  ...  A system is dependable when it can be depended on to produce the consequences for which it was designed, and no adverse effects, in its intended environment.  ...  the cost of developing a new component when high dependability is required.  ... 
doi:10.1002/inst.200811262 fatcat:cxcbwemr6japjnnapr6ojvnh4e

Continuous Location Dependent Queries in Mobile Wireless Sensor Networks

Liang Hong, Gang Zhou, Bo Liu, Sang Son
2011 Wireless personal communications  
In this paper, we study the problem of processing Continuous Location Dependent Query (CLDQ) that retrieves the sampling data of the sensors within a specific area (i.e. query area) around a mobile sensor  ...  data transmissions are smartly scheduled according to its distance to the mobile sensor, and an optimization scheme for continuous processing of CLDQs.  ...  As a result, the cost of TinyDB approach is composed of flooding cost, SRT maintenance cost and data aggregation cost.  ... 
doi:10.1007/s11277-011-0444-y fatcat:jw6yxjifk5bnfavqdfgipqsejy

RescueMe: Location-Based Secure and Dependable VANETs for Disaster Rescue

Jinyuan Sun, Xiaoyan Zhu, Chi Zhang, Yuguang Fang
2011 IEEE Journal on Selected Areas in Communications  
We provide a novel construction for the location update message, and propose several enhancements, to achieve the functional and security goals of RescueMe.  ...  exploited to trace a user's whereabouts when disasters are absent, even if the most powerful collusion attack is allowed.  ...  The stored location information across the network is expected to be accessible to assist in rescue work when the users become survivors of a disaster.  ... 
doi:10.1109/jsac.2011.110314 fatcat:3bhryjfaxzb5phirrkyrsofcka

Storage Tradeoffs in a Collaborative Backup Service for Mobile Devices

Ludovic Courtes, Marc-olivier Killijian, David Powell
2006 2006 Sixth European Dependable Computing Conference  
When the node forwards a packet, its nuglet purse becomes bigger.  ...  We thus propose another characterization of backup systems based on a set of functionalities and of dependability issues, as described in the following sections.  ...  par rapport à k [12] .  ... 
doi:10.1109/edcc.2006.26 dblp:conf/edcc/CourtesKP06 fatcat:tcpc3n54zfblpi6pcflna7dgfy

How will the Tories reform the NHS?

Alan Maynard
2010 Journal of the Royal Society of Medicine  
The advocates of competition in the NHS, be they Milburn-Blair or the Tories, assume that the NHS market is inefficient and that competition is a useful mechanism to challenge this inefficiency.  ...  Conclusions (1) For decades NHS inefficiency has been dealt with by increased funding and the 'redisorganization' of NHS organizational structures. (2) The NHS has had a market (a network of buyers and  ... 
doi:10.1258/jrsm.2010.100124 pmid:20436025 pmcid:PMC2862064 fatcat:mbk5etozd5d3xpbvw3h2gynbcm

'Dependent Contractors' in the Gig Economy: A Comparative Approach

Miriam A. Cherry, Antonio Aloisi
2016 Social Science Research Network  
the time and expense of becoming involved in a lawsuit.  ...  The "sharing economy" began as a way for neighbors to assist each other and to engage in more sustainable modes of production.  ...  If there is to be a third category, establishing one that, like Canada's "dependent contractor," expands the scope of the employment relationship would best meet the needs of gig workers.  ... 
doi:10.2139/ssrn.2847869 fatcat:a3yypn6y5javhotwpfp6zy7cfy


Robert A. Welsh
2000 Journal American Society of Mining and Reclamation  
Cost savings realized by using the GPS technology were applied to earthmoving costs, and resulted in cost savings in a limited funding scenario.  ...  A cooperative project between the OSM Technical Information Processing System (TIPS) team and the state of Colorado serves as a model for the use of GPS and other computer technologies applied to real-world  ...  where earthmoving inefficiencies and the high associated costs sometimes resulted in abandonment before reclamation was completed.  ... 
doi:10.21000/jasmr00010334 fatcat:cgf3ohi76rfdvafuearxucsxdq

Online Cruising Mile Reduction in Large-Scale Taxicab Networks

Desheng Zhang, Tian He, Shan Lin, Sirajum Munir, John A. Stankovic
2015 IEEE Transactions on Parallel and Distributed Systems  
Based on a weighted cruising graph, when a taxicab becomes vacant, pCruise provides a distributed online scheduling strategy to obtain and update an efficient cruising route with the minimum length and  ...  According to the real-time pick-up events from nearby taxicabs, pCruise characterizes a cruising process with a cruising graph, and assigns weights on edges of the cruising graph to indicate the utility  ...  ACKNOWLEDGMENTS This research was supported in part by the US National Science Foundation (NSF) grants CNS-0845994, CNS-0917097, CNS-1239226, CNS-1239108, CNS-1239483 and UMN Thesis Travel Grant.  ... 
doi:10.1109/tpds.2014.2364024 fatcat:vffjdshzvncq5duorbolv3agsm

Leveraging Telematics for Optimal Fleet Performance

Edward Chege Waiyaki, Anton Brits
2015 International Journal of Business, Economics and Management  
The research findings show a positive impact on the delivery of transport services at reduced operational cost after the adoption of the GPS enabled fleet management system in the company transport operations  ...  Evidence of companies reducing costs, eliminating inefficiencies and locating lost equipment are making telematics an attractive investment for transport business owners.  ...  market, which has been characterized by an increase in the importance of time, speed, and reliability on transport operations leading to a higher dependence on road transport (Golicic et al., 2010) .  ... 
doi:10.18488/journal.62/2015.2.2/ fatcat:kgby2frg2rad5ky46bqdcxoe2m

Describing the Clinical Communication Space through a Model of Common Ground: 'you don't know what you don't know'

Craig E Kuziemsky, Lara Varpio
2010 AMIA Annual Symposium Proceedings  
To address this shortcoming we studied collaborative care delivery in two settings and then used Grounded Theory methodology to develop a model of common ground.  ...  The model contains four main concepts: moments of common ground, barriers to common ground, fabric of common ground, and consequences of weak common ground.  ...  which makes grounding a cost worth incurring.  ... 
pmid:21347010 pmcid:PMC3041298 fatcat:kwfn6d7ndban3jl2fmmrps3xjq

Cadeia leiteira em quatro assentamentos da reforma agrária no município Unaí-MG

Rodrigo Lopes Bassoli, Érica Campos Ribeiro, Diego Azevedo Mota, Thiago Vasconcelos Melo, Anderson Alvarenga Pereira
2020 Atas de Saúde Ambiental  
Constatou-se que a rentabilidade econômica da atividade leiteira nos assentamentos é heterogenia.  ...  O estudo teve como objetivo investigar a distribuição dos custos operacionais e rentabilidade econômica da cadeia leiteira em 04 assentamentos da reforma agrária no município de Unaí.  ...  This area was characterized by a commendable social and political environment, when the redemocratization of the country began.  ... 
doaj:125b196af44f4225a589ad2c05a03d8a fatcat:kycfsoo4kresjaa2b7nj6qehx4

Green production — Strategies and dynamics: A simulation based study

Ming Zhou, Yanchun Pan, Zhinmin Chen
2013 2013 Winter Simulations Conference (WSC)  
Secondly, system dynamic models were developed to characterize the dynamic behavior of production systems under Cap and Trade conditions.  ...  There are a number of issues for enterprises to implement green production.  ...  ACKNOWLEDGMENTS This research is funded by the Natural Science Foundation of China (Grant ID: 71172057, 71272089 and 71101094) and Guangdong Provincial Commission of Science and Technology (ID: 2012B070300074  ... 
doi:10.1109/wsc.2013.6721587 dblp:conf/wsc/ZhouPC13 fatcat:a5gc5wb7jvdrhh5ho3qtacvvwu

Combining multiple, inexpensive GPS receivers to improve accuracy and reliability

Daniel K. Schrader, Byung-Cheol Min, Eric T. Matson, J. Eric Dietz
2012 2012 IEEE Sensors Applications Symposium Proceedings  
Thank you for being the foundation of our family, and for creating a supportive, honest, loving environment that ultimately made this thesis possible. iii ACKNOWLEDGMENTS  ...  When applied to devices with limited battery and computational power, these issues of complexity and cost become even greater.  ...  "Offered free of charge and accessible worldwide, GPS is rapidly becoming a universal utility as the cost of integrating the technology into vehicles, machinery, computers, and cellular phones decreases  ... 
doi:10.1109/sas.2012.6166295 fatcat:kktys4eenfh43aa3wav5gkd4ce
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